[Classical Islamic tafsir inherited from Jewish midrash:] "Noah's three sons populated the earth: Shem (Arabs/Jews), Japheth (Europeans), Ham (Africans)."
What the verses say
Classical Islamic tafsir, drawing on the biblical Hamitic curse narrative, associated Noah's son Ham and his descendants — identified as Africans — with a divine curse that marked them for servitude. This framework, circulating as isra'iliyyat (material drawn from Jewish and Christian sources) in Islamic exegetical literature, provided theological warrant for race-based enslavement of sub-Saharan Africans across the Arab-Islamic world.
Why this is a problem
The curse-of-Ham framework became the historical theological basis for race-based enslavement in both Christian and Muslim societies. Arab slave traders operating across the Indian Ocean economy and sub-Saharan Africa invoked this tafsir tradition to provide religious legitimation for the enslavement of Africans specifically. The Arab-Islamic slave trade was larger in duration than the Atlantic trade, comparable in scale, and its religious justification drew directly on classical tafsir that incorporated and propagated the Hamitic curse narrative. The tradition has not been innocent of the consequences.
The Muslim response
Contemporary Muslim scholars, following the tradition of rejecting unreliable isra'iliyyat material, argue that the curse-of-Ham narrative has no genuine Quranic basis — it is a foreign accretion absorbed from Jewish and Christian exegetical tradition, not a teaching the Quran endorses. Modern Islamic scholars across the spectrum, from Yusuf al-Qaradawi to Tariq Ramadan, affirm that Islam categorically rejects racism and that the Quran's own statements on human equality — Q49:13, establishing that the most honored before Allah is the most pious regardless of race — are the authoritative Islamic position. The isra'iliyyat classification is the established Islamic scholarly mechanism for purging foreign material that entered the tafsir tradition without Quranic or strong hadith grounding. The slave-trade legitimation based on the Hamitic curse represents a corruption of Islamic teaching, not its expression.
Why it fails
Rejecting isra'iliyyat is reformist work being done against fourteen centuries of classical tafsir that freely incorporated such material and used it to justify institutional practices. The rejection is admirable as a contemporary scholarly position but cannot undo the historical record: the curse-of-Ham framework operated in Islamic legal and theological literature for over a millennium, supplied the theological warrant for Arab enslavement of Africans, and shaped Islamic jurisprudence on slavery in ways that Muslim reformers today are still working to address.
Murray Gordon's Slavery in the Arab World and polemicist Andrew Bostom's The Legacy of Jihad both document that the Hamitic curse narrative was not peripheral Islamic folklore but operative theological legitimation for the Arab-Islamic slave trade. The contemporary scholarly consensus that this material is isra'iliyyat to be rejected does not retroactively change what it did when it circulated as authoritative tafsir. The fact that modern scholarship can identify the material as isra'iliyyat is evidence of current reformist progress, not evidence that the tradition was innocent of the consequences — which it was not, and which the fourteen-century historical record establishes beyond reasonable dispute.